Ecología productiva de la dehesa

Abstract

This unique area in Spain is described combining pasture and oak [Quercus] vegetation generating low income, but producing high quality livestock. Brief notes are provided on geochemical aspects (with leaching as the main geochemical process) of this pasture-tree zone described as a system of hill slopes. Information is included on production volumes of biomass by oak trees and its use in the production of the Iberian pig breed. Fragility of the ecosystem is emphasized, and difficulties are discussed of maintaining the right balance between vegetation and production of livestock (sheep, pigs and cows). Diagrams are included on relationships between areas covered with trees and pastures, and livestock production, and oak tree coverage in areas with and without livestock.